1 MILE RANGE: One mile range e-collar that can support training up to 6 dogs with the same remote with purchase of additional collars (SDR-AXW). For dogs 8 pounds or larger with neck sizes 5" - 22". NO LOOK OPERATION: Designed for ease-of-use and no look operation while offering more levels of stimulation which allows for more customized training. 21 LEVELS OF STIMULATION: This electric e collar offers 21 levels of static stimulation with low/medium/high ranges. Option to train with vibration (buzz) and tone (beep), too. WATERPROOF: Submersible to 25 feet using DryTek technology. Designed for the waterfowl environment with Realtree Max-5 camo finish. RECHARGEABLE BATTERY: Lithium-ion batteries charge in 2 hours. Transmitter battery lasts 40-60 hours per charge. Receiver battery lasts 140-160 hours per charge. System has low battery indicators. INCLUDES: Remote Transmitter with Removable Antenna, Receiver on 3/4" Collar Strap, Charging Cradle, Charging Adaptor, Standard Contact Points, Large Contact Points, Lanyard, Belt Clip, Test Light Tool, Operating Guide & Basic Training Manual.